The mod_wrap package allows the proftpd daemon to provide tcpwrapper-like
access control rules while running in standalone mode. It also allows for those
access rules to be stored in various formats, such as files (e.g.
/etc/hosts.allow and /etc/hosts.deny) or in SQL tables.
The most current version of mod_wrap's submodules supports storage of access
table information in various formats:
o mod_wrap_file for file-based access tables
o mod_wrap_sql for SQL-based access tables